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Find out what your date is really thinking. The Truth Wristband kit measures the galvanic skin response which is used in larger lie detector tests, and turns from blue to red when the wearer gets nervous. All the parts you need are included: an etched PCB, finger strap, Velcro wristband, TRUTH face plate, batteries and instructions. You need to do some soldering but for $44.95, we figure it should pay for itself after the first transgression.